TY - GEN
T1 - Study on spurious suppression method of high accuracy DDS
AU - Wu, Caipeng
AU - Zhou, Binquan
AU - Fang, Jiancheng
N1 - Publisher Copyright:
© 2015 IEEE.
PY - 2016/6/10
Y1 - 2016/6/10
N2 - The traditional Direct Digital Synthesis (DDS) is based on the method of ROM look-up table for phase-amplitude conversion, and the signal quality does not meet the high accuracy requirements in the condition of high frequency resolution, because of phase truncation causing the serious signal deterioration of spectral properties. For the problem, the key research is the application of coordinate rotation digital computer (CORDIC) algorithm to DDS signal source, and to propose an improved algorithm to reduce ROM consuming and iterations, especially in favor of hardware implementation. The design of novel DDS signal source is based on the improved CORDIC algorithm and the phase accumulator without frequency error. The simulation results show the signal source has advantages of relatively pure frequency spectrum, high SNR and obvious spurious suppression. Accordingly, the new DDS signal source is able to meet high frequency resolution and accuracy requirements simultaneously. The DDS signal source based on the spurious suppression method is easy to implement on FPGA, so it has important practical significance to the design of DDS signal source.
AB - The traditional Direct Digital Synthesis (DDS) is based on the method of ROM look-up table for phase-amplitude conversion, and the signal quality does not meet the high accuracy requirements in the condition of high frequency resolution, because of phase truncation causing the serious signal deterioration of spectral properties. For the problem, the key research is the application of coordinate rotation digital computer (CORDIC) algorithm to DDS signal source, and to propose an improved algorithm to reduce ROM consuming and iterations, especially in favor of hardware implementation. The design of novel DDS signal source is based on the improved CORDIC algorithm and the phase accumulator without frequency error. The simulation results show the signal source has advantages of relatively pure frequency spectrum, high SNR and obvious spurious suppression. Accordingly, the new DDS signal source is able to meet high frequency resolution and accuracy requirements simultaneously. The DDS signal source based on the spurious suppression method is easy to implement on FPGA, so it has important practical significance to the design of DDS signal source.
KW - DDS
KW - angle optimization
KW - improved CORDIC algorithm
KW - signal source simulation
KW - spurious suppression
UR - https://www.scopus.com/pages/publications/84979701299
U2 - 10.1109/PIC.2015.7489901
DO - 10.1109/PIC.2015.7489901
M3 - 会议稿件
AN - SCOPUS:84979701299
T3 - Proceedings of 2015 IEEE International Conference on Progress in Informatics and Computing, PIC 2015
SP - 516
EP - 520
BT - Proceedings of 2015 IEEE International Conference on Progress in Informatics and Computing, PIC 2015
A2 - Xiao, Liang
A2 - Wang, Yinglin
PB - Institute of Electrical and Electronics Engineers Inc.
T2 - 3rd IEEE International Conference on Progress in Informatics and Computing, PIC 2015
Y2 - 18 December 2015 through 20 December 2015
ER -